How much does a 3.00 to 4.99ct I SI2 natural princess diamond cost?

As of October 2026, 3.00 to 4.99ct I SI2 natural princess diamonds typically cost HK$127,730 HKD to HK$346,448 HKD, with a median price of HK$222,637 HKD. There are currently 22 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI2 princess diamond?

About 30% of these diamonds are available at multiple retailers, with an average price spread of 42%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I SI2 Natural Princess

Quick answer

As of October 2026, there are 22 natural princess diamonds with I colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$127,730 HKD to HK$346,448 HKD, with a median of HK$222,637 HKD. At least 45 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 42%. Half of all listings fall between HK$45,310 HKD and HK$68,486 HKD per carat. The same specification in lab grown form lists at a median of about HK$6,448 HKD per carat. Over the last 30 days the median price moved -0.9% and the number of listings moved +3.2%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Princess natural stones in the index: 2,158 USD per carat, +5.7% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

Lowest Price

HK$84,381 HKD

Highest Price

HK$513,068 HKD

Average Price

HK$224,801 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

29.7%

Price Spread

42.1%

30-Day Price Trend

-0.9%

30-Day Supply Change

+3.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$7,020/ct

10th Percentile

$4,532

Median

$7,020

90th Percentile

$10,775

Score Distribution

53 diamonds scored across 4 quality tiers

Excellent

11 (20.8%)

Very Good

11 (20.8%)

Good

6 (11.3%)

Average

25 (47.2%)

Find Your Diamond

Search 22 I SI2 princess diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

J SI2J colour is visually identical to I to the naked eye

Save 15%

Lab-Grown I SI2Same specifications, lab-grown origin

Save 88%

Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1